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Informix - Problem description

Problem IT37932 Status: Closed

EXCEPTION DURING QUERY OF SYSSQLSTAT TABLE MAY LEAD TO SESSION HANG

product:
INFORMIX SERVER / 5725A3900 / E10 - 
Problem description:
If an exception is raised during the processing of a query
relating to the sysmaster table syssqlstat the clean up
operation may result in a further exception resulting in a loop
of the sqlexec thread. At the same time other threads may become
blocked waiting on the session mutex.

As the problem thread is in a running state the stack obtained
via onstat may be unreliable. Use the onmode -X stack command or
an OS command such as pstack to obtain a stack:

sigprocmask()
mt_sighold()
mt_ex_throw_sig()
mt_ex_end_keep_var()
prsqlstat()
pstread()
rsread()
fmread()
readseq_single()
gettupl()
scan_next()
next_row.part()
get_first_row_from_producer()
group_open()
prepselect()
open_cursor()
sq_open()
sqmain()
spawn_thread()
th_init_initgls()
startup()

This problem is first seen in versions where IT35916 is fixed.
Problem Summary:
****************************************************************
* USERS AFFECTED:                                              *
* Users of Informix Server prior to 12.10.xC15 and 14.10.xC7.  *
****************************************************************
* PROBLEM DESCRIPTION:                                         *
* See Error Description                                        *
****************************************************************
* RECOMMENDATION:                                              *
* Upgrade to Informix Server 12.10.xC15 or 14.10.xC7.          *
****************************************************************
Local Fix:
Solution
Workaround
****************************************************************
* USERS AFFECTED:                                              *
* Users of Informix Server prior to 12.10.xC15 and 14.10.xC7.  *
****************************************************************
* PROBLEM DESCRIPTION:                                         *
* See Error Description                                        *
****************************************************************
* RECOMMENDATION:                                              *
* Upgrade to Informix Server 12.10.xC15 or 14.10.xC7.          *
****************************************************************
Comment
Fixed in Informix Server 12.10.xC15 and 14.10.xC7.
Timestamps
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :
09.08.2021
02.11.2021
02.11.2021
Problem solved at the following versions (IBM BugInfos)
Problem solved according to the fixlist(s) of the following version(s)
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